Delivery mechanism for printing machines



SM FOR PRINTING MACHINES Filed July 0. 925 2 Sheets-Sheet 1 Patented Nov. 24-, 1925, f

FRED warm, or insnnwoon, OTLEY, ENGLAND.

DELIVERY MECHANISM FOR TEBINTING: MACHINEEE.

Application filed July 20, 192-5v Serial No. 44,709.

To all whom it may concern:

Be it knownthat I, FRED WAITE, a subject of the King of Great Britain, and resident of Inglewood, Otley, in the county of York, England, have invented certain new and useful Improvements in Delivery Mechanism for Printing Machines, of which the following description, having reference to the accompanying sheets of drawings, is. a specification. 1

My invention relates to printing machines wherein the printed sheets as they are delivered from the printing cylinder are re- .ceived by grippers carried by traveling chainswhich carry said sheets along their path of delivery with their printed or face sides downwards and deposit same on a table or other device with their said printed or face sides upwards and my said inven tion consists in the application of sheet supporting bars which extend crosswise from the delivery chain on one side to the delivery chain on the other in such manner that when the grippers carried by the usual traversing or cross shafts engage the leading edge of a printed sheet-they carry such edge forward while the body of the sheet lies relatively at the rest upon the supporting cross-bars of thechains until the position is reached where the sheet commences to turn in a downward direction prior to being deposited face upwards; and in this position I also provide receiving means which will receive the rear end of the sheet so that as said rear end commences to fol low its downward path from its upper horizontal path to the position which it ultimately occupies in the pile of sheets below,

its rear end is received and supported by devices which conduct it and carry it so that the whole sheet moves above and over the printed sheets beneath in such a manner that when the second supporting devices are withdrawn by a reversal of their motion they permit the rear edge of the sheet to descend gradually and simultaneously with the descending of the front edge of the sheet as this is released by the grippers on the chain, thus each printed sheet is carried throughout its whole path and deposited in the position desired with the least liabality of any of said sheets being creased or smeared at any part by trailing one sheet over another While said actions are being carried out.

"In order that my said invention may be is a plan of the parts shown by machine.

According to my invention I arrange the two side chains 2 and 2 in the position shown so that as the printed sheets are delivered by the gripped cylinder 3 face downwardsto said chains 2 and 2 one or other of the sets of grippers 4 thereon will lay hold of the leading edge of each of said sheets (such as the sheet a shown by Fig. 2) and carry same face downwards along the upper portion 6 of the chains as shown by Fig. 1. In order to support the rear ends of the sheets as these latter are carried in the paths described, I arrange supporting members, preferably in the form of cross tubes 8 to extend from the chain 2 on one side to the chain 2 on the other side, and be secured to said chains in manner hereinafter explained. K

As stated although I preferably make use of cross tubes 8, it is obvious that solid or flat flexible bars may be used, or even cords or fabrics may be employed for supporting the rear ends of the sheets.

The printed sheet carried as above explained will rest face downwards upon one or other of the series or sets of cross bars 8 which extend from the chain 2 to the chain 2* throughout the whole length thereof.

The chains 2 and 2" are carried over sprocket wheels 5, 5 at the end of the machine and forward from the sprocket wheels 5, 5 they extend over guiding wheels 6 and 6 to finally pass around the sprocket wheels 9 and 9 which bring them into appropriate proximity to the cylinder 3. The grippers 4 are caused to grip and to release their said grip upon the sheet, by devices well known in connection with printing machinery.

In combination with the chain devices arranged as above described I also make use of curved guiding members 10 which are f xed upon cross bars 11 that are mounted arm 19 which has another arm 20 lined upon it so that the lower end of this arm 20 may have pivoted upon it a runner or bowl 21 for contact with the peripheral surface oi? a, cam 22 that is fixed upon the shaft of a driving wheel23 which derives; its motion from any suitable motor shaft Oft-ll machine as willbe understood.

The cam 22 is arranged to revolve at the desired speed relative to the surface speed of the chains 2, 2 so that when any of the grippers 4 carrying the leading edge of a sheet have advanced suiiiciently far for the rear edge of said sheet to be brought beyond being in alignment with the centre of the shaft cZ-thenthe curved supporting members 10 will be raised into the position shown in broken lines'Fig. 1 and'i'rom this position, as the chains 2, 2 and their grip- 1J1S h(3011t1111lin motion to carry forward the sheet referred to, the cam 22 will have l*fli' t 'l"lt """ttl aomncec sir cicn iy .oiwaic o peimi ie springs-24e to recoil and bring down the curve members 10 whichundertl e control ofthe cam 22z-will be at: thesamespeed in mison With-tl1QQ10iJlO11Df'tl13 sheet carried :by

I tenden ythat t rear end of the sheet may have to move-be V yond the desired curved path which ithas v t,o'i"*o llow, is prevented by thecurved members l0 (which receive that part of each the grippers 4 thus any;

sheet) and'these con tinuetheir motion along with the sheet ,until the gr ppers i have reached the position where it is des rable that they should deposit. thesheet upon. the pile of sheetsat gsothat just-prior to the releasing of said grippei's the curved supporting members 10 will commence to recede n order that the sheet may be-permitted to fall. by gravity directly onto the pile oi sheets g-beneath thusiall tendency I to cause any sheet to be dragged or trailed "over any printed part ,of any preced ng sheet is i entirely avoided.

The return ,inotion of the curved supporting members 10 as beforestated, is effected by the actions of a cam- 22 at the ,desired speed so that the upper endsof the curved members 10 will reach the position shown in broken lines Fig. 1 at about the same time that the rear end of theneXt orsucceeding sheet has reached thesame position,

As is liei'einbefore stated I preferably make use of hollow or cylindrical cross bars 8 in order that the whole chain and the parts it carries may be as light as possible, and in order to be enabled to readily detach or mount anyone of said bars 8 'trom its position .and into its position on the chains 2 and 2 I have the links of: the said chains coupled together by hollow pins or rivets 30. This enables me to employ plugs 31 which I. mount in the outer ends of the tubes or bars 8 so that same may take into the said openings in the rivets 30.

Theplugfil is fixed by a pin SF in the end of the tube 8 as is shown by Fig. 3 while the, plug 81" at the opposite end is made to slide longitudinally into the end of said tube 8 where it is normally held in the. position shown by Fig. 3, by a spring 82 resting against it and against a cross pin 33 fixed within the tube, thus by forcing the plug 31 endwise into the tube 8 until it is clear of the rivet 30 the said tube 8 may be removed whereas on desiring to replace said tube in position, the plug 31 may be forced into the interior thereof until the tube is brought into alignment with the hole in the .rivet 30 on which by releasing the hold of said plug the spring 32 is permitted to recoil in order to force said plug outwardly to enter the hole in the rivet 30.

Such being the nature and object oi": my said invention, what I claim is 1. In delivery mechanism for printing machines, travelling chains, grippers carried by said chains,sprocket'wheels over which said cha ns aremade to take, means for transmitting motion to said sprocket wheels,

means extending between and carr'ed by said chains to support the rear portion of the sheets and devices for receiving and depositing the printed sheetsas delivered by said chain and released by the grippers thereon.

2.'In delivery mechanism 'for printing machines, travelling chains, grippers carried by said chains, sprocket whee-ls over which said chains are made to take, means for transmitting motion to said sprocket wheels, seriesgof crossbars extending from one chain to the other, oscillating members for receiving and depositing the printed sheets asdelivered said chains and released by the ;grippers thereon, and means for operatin-gfsaid' oscillating meinbersto receive each sheet-successivelyand deposit same onthe sheets beneath.

3. In delivery mechanism for printing machines, travelling chains, gripperscarried bysa-id chains, sprocket wheels over which 1 said chains are made totake, means for transmitting motionto said sprocket wheels, means for supporting therear ends of the sheets carried by the chains, oscillating arms supporting members which are oscillated in proximity to the travelling chains,

Til

4. In delivery mechanism for printing machines, travelling chains, grippers carriedv by said chains, sprocket Wheels over which said chains are made to take, means for transn'iitting motion to said sprocket wheels, series of cross bars detachably mounted upon said chains, said cross bars having fixed and spring actuated pivotal connections for engaging With the rivets of the chains, devices for receiving the printed sheets as delivered by the chains and means for receiving the delivered sheets.

5.111 delivery mechanism for printing machines, travelling chains, grippers carried by said chains, sprocket Wheels over which said chains are made to take, means for carrying the rear ends of the sheets mounted upon said chains, curved oscillating members mounted to oscillate in paths approximately parallel to the curved paths in which the chains travel and means for transmitting motion to said curved members.

FRED VAITE. 

